Cool, so for $2,000 more I can get the battery I should've gotten with the A7RII and not much else.
There are practical limits of what matters. 35mm film was adequate for a hundred years; it's not like all the big budget productions switched to 65/70mm when it became available. The films you're shooting in 1080P won't be rendered obsolete when 8K is common.
Personally, I'd much rather shoot with a 2.6K Alexa than an 8K RED.
"all you really have to do is remove the front of the lens and turn it around before reattaching it."
Right. Easy peasy.
Make sure you put tungsten bulbs in your clamp lights, not CFL or LED.
With a low CRI, even one light will render subjects poorly. Big chunks of the color spectrum are simply missing; it's not just about temperature and tint.